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The internal and external radii of …

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The internal and external radii of a spherical shell are 3 cm and 5 cm respectively. It is melted and recast into a solid cylinder of diameter 14 cm, find the height of the cylinder. Also find the total surface area of the cylinder.

    • Posted by Merlyn Evg 3 years, 6 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Muskan Sharma 3 years, 6 months ago

    Let the intenal and external base radi of spherical shell be r and R respectively. r=3cm, and R=5cm. Base radius of a solid cylinder, r'=7cm. the volume of solid cylinder = volume of a spherical shell πr'²h = 4/3×π (R³-r³) 49h = 4/3 (125-27) h = 4/3 × 98/49 h = 8/3 cm

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